Bose-Einstein Condensation with Entangled Order Parameter

Details Bose-Einstein Condensation with Entangled Order Parameter Bose-Einstein Condensation with Entangled Order Parameter

2006-03-28

arxiv.org/abs/cond-mat/0603754v2

Phys. Rev. Lett. 96, 140401 (2006)

Physics

Condensed Matter

Other Condensed Matter

V1: 5 pages, 4 figures. Accepted by Phys. Rev. Lett.; V2: A couple of very minor typos corrected, published

Scientific paper

10.1103/PhysRevLett.96.140401

We propose a practically accessible non-mean-field ground state of Bose-Einstein condensation (BEC), which occurs in an interspecies two-particle entangled state, and is thus described by an entangled order parameter. A suitably defined entanglement entropy is used as the characterization of the non-mean-field nature, and is found to persist in a wide parameter regime. The interspecies entanglement leads to novel interference terms in the dynamical equations governing the single particle orbital wavefunctions. Experimental feasibility and several methods of probe are discussed. We urge the study of multi-channel scattering between different species of atoms.

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